diff --git a/plat/arm/common/arm_pm.c b/plat/arm/common/arm_pm.c
index 498dedf32..3e6c9f287 100644
--- a/plat/arm/common/arm_pm.c
+++ b/plat/arm/common/arm_pm.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2024, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2025, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -56,6 +56,10 @@ int arm_validate_power_state(unsigned int power_state,
 	if (psci_get_pstate_id(power_state) != 0U)
 		return PSCI_E_INVALID_PARAMS;
 
+#if PSCI_OS_INIT_MODE
+	req_state->last_at_pwrlvl = psci_get_pstate_pwrlvl(power_state);
+#endif /* __PSCI_OS_INIT_MODE__ */
+
 	return PSCI_E_SUCCESS;
 }